Many places around the world have no idea how much groundwater and surface water they have, let alone how much they can use sustainably. The United Nation's proposed Sustainable Development Goals, however, could transform the way governments understand and manage scarce water resources.

The Bonn Challenge, a global movement aimed at starting to restore 150 million hectares by 2020, is on track to meet or exceed this ambitious goal. International partners meet in Bonn this week to discuss progress already made and a vision for what should happen after 2020.

Local communities in Africa, Asia and Latin America can lose access to critical resources when land rights are weak, threatening food and incomes for more than two billion people. Three fundamental goals must be achieved to improve land rights.

Mexico City will invest $150 million in energy-efficient buses, public bike-sharing and car-free days-one of the largest sustainable mobility investments in the city's history. It's a significant step forward in orienting Mexico City around people, not cars.

With the changing global climate, river flooding in cities worldwide has emerged as an immense challenge to urban resilience.

Since average global temperatures are already rising and the effects of climate change are becoming increasingly palpable around the world, cities need to focus on adaptation measures in order to strengthen their resiliency and better protect billions of global urbanites.

Understanding how to curb global climate change first requires knowing where the world’s emissions are currently heading. The new CAIT Projections module provides access to emissions projections for major emitters through the year 2100.